Adds 400 or 401 check to nativeAPI test (Azure#13513)

Author: zfoster

sdk/cosmosdb/cosmos/test/public/functional/offer.spec.ts

@@ -117,8 +117,8 @@ describe("NodeJS CRUD Tests", function() {
         await client.offer(offerBadId._self).replace(offerBadId);
         assert.fail("Must throw after replace with bad id");
       } catch (err) {
-        const badRequestErrorCode = 400;
-        assert.equal(err.code, badRequestErrorCode);
+        // check for 400 or 401 since some backends validate auth first
+        assert(err.code === 400 || err.code === 401);
       }
     });
   });